American Fibertek SM9p - Manual (Page 136)

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SMTP Configuration interface
IP Security
IP security function allows the user to assign 10 specific IP addresses that have
permission to access the switch through the web browser for the securing switch
management.
 IP Security Mode: When this option is in Enable mode, the Enable HTTP Server
and Enable Telnet Server checkboxes will then be available.
 Enable HTTP Server: When this checkbox is ticked, the IP addresses among
Security IP1 ~ IP10 will be allowed to access this switch via HTTP service.
 Enable Telnet Server: When this checkbox is ticked, the IP addresses among
Security IP1 ~ IP10 will be allowed to access this switch via telnet service.
 Security IP 1 ~ 10: The system allows the user to assign up to 10 specific IP
addresses for access security. Only these 10 IP addresses can access and manage
the switch through the HTTP/Telnet service.
 And then, click Apply button to apply the configuration.